Here is how I approached painting the Mutants from the 'Accursed Cultists' kit.

Corrupted Flesh

1. Basecoat with a mix of 3 parts Cadian Fleshtone , 1 part Administratum Grey and 1 part White Scar .
2. Now wash the skin with a 1:1 mix of Reikland Fleshshade and Contrast Medium .
3. Shade sore and mutating areas with a glaze of 1:1 Khorne Red and Gal Vorbak Red .
4. Pick out highlights with ahn equal parts mix of Cadian Fleshtone , Administratum Grey and White Scar .
5. Add some more White Scar to the above for selective highlights.
6. Finish off points that need extreme highlights with very small dots of pure White Scar .

Purple Cloth

1. Basecoat with a 1:1 mix of Naggaroth Night and Screamer Pink .
2. Shade recesses with thinned down Abaddon Black .
3. Add chunky highlights of Screamer Pink .
4. Now fine edge highlights of 1:1 Screamer Pink and Ushabti Bone .
5. Now add some Wraithbone to the mix and selectively highlight corners and points where light would hit.
6. Add specular highlights of pure Wraithbone , where needed.

Chitinous Mutations

1. Basecoat with a 1:1 mix of Screamer Pink and Abaddon Black .
2. Highlight pick out raised details with glazes/highlights of Screamer Pink .
3. Fine highlights of 1:1 Screamer Pink and Fenrisian Grey .
4. Selective highlights of Fenrisian Grey .
5. Add dots of Ulthuan Grey to select points.

Gold Mask

1. Basecoat with a 3:1 mix of Vallejo Metal Color Gold and Copper .
2. Wash with Reikland Fleshshade .
3. Shade around recessed and in deep recesses with 1:1 Doombull Brown and Abaddon Black .
4. Pick out highlights with Gold
5. Fine highlights with Vallejo Model AIr Silver RLM01 Metallic .

Grey Cloth

1. Basecoat with Stormvermin Fur .
2. Shaderecesses with Stormvermin Fur and Abaddon Black , I also chucked in a touch of Incubi Darkness , just to add some interest.
3. Highlight with a 1:1 mix of Stormvermin Fur and Administratum Grey .
4. Mix some White Scar into the Administratum Grey and add fine highlights.

White Cloth

1. Basecoat with Corax White .
2. Wash with Apothecary White .
3. Shade deep recesses with thinned Skavenblight Dinge .
4. Add edge highlights with Corax White and selective highlights of White Scar .
5. Finish with dot highlights of White Scar if/where needed.

Black Armour

1. Basecoat with Abaddon Black .
2. Chunky highlights with Dark Reaper .
3. Fine edge highlights of 1:1 Dark Reaper and Administratum Grey .
4. Selective highlights of Administratum Grey .
5. Specular highlights, with a mix of Administratum Grey and White Scar .

Black Leather

1. Basecoat with Abaddon Black .
2. Glaze raised areas with a 1:1 mix of Abaddon Black and Skavenblight Dinge .
3. Chunky Highlights of Skavenblight Dinge .
4. Fine highlights of Stormvermin Fur .
5. Selective highlights of Karak Stone .
6. Mix a little White Scar into your Karak Stone and add a few specular highlights, where light would really hit.

Brown Leather

1. Basecoat with Rhinox Hide .
2. Glaze/highlight with Doombull Brown .
3. Edge highlight with XV-88 .
4. Mix some Wraithbone into your XV-88 and selectively highlight corners and curves.
5. Add specular highlights of Wraithbone to corners.

Jade Spikes

1. Basecoat with Abaddon Black .
2. Glaze Incubi Darkness towards the tip.
3. Edge highlight with Kabalite Green .
4. Mix the Kabalite Green 1:1 with Deepkin Flesh and selectively highlight the point.
5. Finish with a dot of Deepkin Flesh .